Unloading apparatus for dump trucks



Jan. 29, 1952 s. WALL UNLOADING APPARATUS FOR DUMP TRUCKS 8 Sheets-$heet l Filed May 28, 1949 Jan. 29, 1952 L 5 WALL UNLOADNG APPARATUS FOR DUMP TRUCKS 8 Sheets-Sheet 2 Filed May 28, 1949 8 Sheets-Sheet 5 WD5/W5 WAM INVENTOR.

Arm/fwn l... S. WALL UNLOADING APPARATUS FOR DUMP TRUCKS Jan. 29, 1952 Flled May 28, 1949 `8 Sheets-Sheet 4 L. S. WALL.

UNLOADING APPARATUS FOR DUMP TRUCKS Jan. 29, 1952 Filed May 28, 1949 m35/WJ Wm INVENTOR.

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Jan. 29, 1952 L 5, WALL UNLOADING APPARATUS FOR DUMP TRUCKS 8 Sheets-Sheet 8 Filed May 28, 1949 Mms/W5. Wm

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Patented Jan. 29, 1952 UNITED STATES PATENT OFFICE UNLOADING APPARATUS FOR. 'DU'MP 'TRUCKS This linvention relates to vehicular dumptrucks and the like and more especially :to :anzunloa'ding apparatus adapted to -be connected to lthe rear end of the frame of the truck .and wcomprising 1a longitudinally movable `supporting frame for a gear box mounted on the lrearlend of thechassis of the truck and having a universal mounting thereon for supporting one `end of a conveying apparatus, whereby the gear box may be moved to a position Where it will jbe disposed below the discharge end of the truck bed when it is `desired to -remove the contents ofthe truck bed by tilting or raising the front end of the same, so as to cause the contents therein to slide out of the `rear portion of the bed of the truck by gravity as well as for delivering the contents to a point remote `from the truck.

There are many typesof trucks'now employed for transporting aggregate such as sand, crushed stone, coal and the like, from one place to another and the beds 'of which 'are pivotally ,connected adjacent theirear end of the chassis ofthe truck and 'having means for raising the frontend of the bed of the `truckso as 4,to dump the contents of `the .bed of the Ltruck rearwardly oi the same. There are many other trucks employed having beds which are xed `to the chassis of the truck throughout their lengths and having various types `of conveying means'extending :along the bottom portion Aof the bed for emptying the contents :of the bed `of `the truck rearwardly i the same .and `thus Aeliminating the necessity :of

tilting the truck bed ,for removing the `contents therefrom.

However, for all practical purposes, particularly in transporting `coal `,from a coal yard to .fa home, it has been :necessary mto provide rtrucks having a non-tiltable-bed with asuitable conveying or discharging apparatus ,at the rear fend thereof onto which the conveying means `disposed at the bottom portion of the bed woulddirectthe aggregate from within the bed and forlcarrying the `contents from `the :rear end pi the bed to points some distance 4away :from the truck and which may be inaccessible to thetruclg.

it has not been possible, hlhowever, 1go-mount a conveying apparatus at the rearlof-.the dump ,bed type of truck which would carry thecontents discharged from the dump bed of the truck to a point remotely disposed from :the same, Yother than d by the use or" a sheet metal chute or the like.

it is therefore anobject `of this invention `,to provide an unloading motor truck having ya dump @amounted-thereon with a gear housing having train of gears therein and-a `connection between the gear housing and the power take-off of the truck and to provide aunversal .mounting on the gear `housing .which is :adapted to .receive one end Yof la discharge conveyor vwhich is removably oonneeted thereto, this end of the conveyor normally -being disposed immediately below the openingattherearof the bed through which the contents are discharged onto the conveyor.

It is another object of this invention to provide an `unloading motor truck of the type described in-which thelgear housing is telescopically rnonnted at the rear of the chassis of the truck and the l,delivery conveyor being removably se- Quredito the universal mounting, vso the delivery conveyor may be removed from the same and theuniversal mounting along with the gear housingmay be moved to a position beneath the rear fnd of .the bed of the truck and out of vertical ali-nement with the opening at the rearend of the bed when the bed is in a tilted position for empty ling the contents rearwardly of the truck without the euse of a discharge conveyor in the truck bed.

`Itis another object of this invention to provide an apparatus of the type described for use with motor :vehicular trucks, the truck being provided avith hydraulically operable means for raising the `frontend ofthe dump bed of the truck and to provide control means at the rear of the truck and connections between the same and the hydraulioallyioperable means for tilting the bed and. other control means adjacent the same for controlling the uconventional `clutch means which normally ,engagesthe power take-oir of the truck so an op- Groter maycontrol the raising and lowering of the front end ofthe dump bed of the truck and also thefstarting and stopping of the discharge con- -`veyor from the rear of the truck.

It pis another object of `this invention to provide iin ;amotorvehicular truck of the class described a power transmission unit disposed intermediate ithe1,conventional power take-off and the gear box ,andhavllg agear train therein. The transmis- .sionunit is also :disposed intermediate thepower talee-ofi and the motor for the hydraulically 'operable means fior raising and lowering the front .end of the bed of nthe truck and comprises a gearhousing secured Ito the truck and having a pair oiintermeshing gears therein, so they will tnrn in ,opposite directions, one of the gears xedly mounted `on a shaft .extending through Vopposed `ends of the housing, the ends ,of the shaft Lbeing provided with universal joints ior connecting one end with the shaft from the power take-.off Vand for connecting the other 7`yvith`=a shaft extending to the gear housing for ythe,delivery,conveyor apparatus, and the other of the gears 'being xedly mounted on `a shatter tending-through one of the wallsoi saidhousing (and l,having a universal joint thereon for con- 1necting the same to a second `shaft extending to ,the vmotor Lforoperating the `hydraulicaily `oper able means for raising the front end of the truck bed.

It is another object of this invention to provide a modied means for transmitting motion from the power take-off to the hydraulic motor and also to the gears disposed within the gear housing for the conveyor mechanism comprising a housing having a pair of sprocket wheels therein and a sprocket chain connecting the sprocket wheels so they both turn in the same direction, one of the sprocket wheels being mounted on a shaft extending out of the housing at both its rear and front ends, and being connected at one end to the shaft from the power take-off while the other end is connected to a shaft extending to the gear housing for driving the delivery conveyor. The other of the sprocket wheels is fixedly mounted on a shaft which extends rearwardly only from the housing and is connected by a universal joint to a shaft extending to the hydraulic motor which is instrumental in the raising and lowering of the front end of the dump vtruck bed. Y

Some of the objects of the invention having been stated, other objects will appear as the description proceeds, when taken in connection with the accompanying drawings, in which- Figure 1 is a top plan View of a truck on the chassis of which a dump bed is mounted and showing the delivery conveyor apparatus con- VnectedV thereto and showing various connections between the conveyor apparatus and the power ntake-off of the truck, the front portion of the truck being broken away;

Figure 2 is an elevation taken along the line 2-2 in Figure l, showing the power take-01T `mechanism associated with the conventional truck and the transmission and is taken substantially along the line 3 3 in Figure 2;

Figure 4 is an enlarged elevation of the truck looking up at the lower side of Figure 1 but omitting the conveying apparatus and showing the dump truck bed in a horizontal position;

Figure 5 is a rear elevation of the truck looking from-the right-hand side of Figure 4 to the left;

Figure 6 is anfenlarged elevation of an intermediate gear housing showing the manner in which it is secured to the chassis of the truck andv is taken substantially along the line 6 6 in Figure 4;

fFigure 7 is a fragmentary view of the righthand lower portion of Figure 4 but showing the dump truck bed in a tilted position and showing the universal mounting for the conveyor positioned beneath the chassis of the truck;

Figure 8 is an enlarged vertical sectional view taken substantially along the line 8-8 in Figure 7 and showing the stationary side rails for supporting the gear housing with the universal mounting for the conveyor;

Figure 9 is an enlarged elevation with parts broken away and showing other parts in` section and is taken substantially along the line 9-9 in Figure 5 and showing the manner in which the movable frame is mounted in the pivoted frame for supporting the universal mounting for the conveyor;

Figure 10 is a side elevation similar to Figure 4, with parts in section, and showing the rear portion of the truck but omitting the wheel on the side nearest the observer, and showing the truck body in a tilted position and also showing the detachable delivery conveyor frame mounted on the universal mounting;

Figure 11 is an enlarged elevation of the universal mounting and the conveyor associated therewith and showing the supporting means for the universal mounting in cross section and is taken substantially along the line II-II in Figure 10;

AFigure 12 is a vertical sectional view partly in section and showing the gear box of the universal mounting and associated parts and is taken along the line I-2-I2 in Figure 11;

Figure 13 is a fragmentary vertical sectional view taken along the line I3-I3 in Figure 11 and showing the feed end of the detachable delivery conveyor;

'Figure 14 is an enlarged vertical sectional view showing the manner in which the movable frame is mounted in the pivoted frame and is taken along the line I4|4 in Figure 7;

Figure 15 is an elevation with parts broken away looking substantially along the line I5--I5 in Figure 6;

Figure 16 is a vertical sectional view taken along the line I6-I6 in Figure 15 but showing a modified form of power transmission means ,from that shown in Figure 6;

Figure 1'7 is a vertical sectional view through the gear housing and the universal mounting and Vis taken substantially along the line I'I-I'I in substantially along the line Iii-I8 in Figure 10.

Referring more specically to the drawings, the numeral Il) designates the rear wheels of a suitable motor truck which are mounted on the outer ends of axles 9 disposed in the conventional axle housing II. The truck also has a pair of front wheels which are not shown. The axle housing H has mounted thereon conventional springs I2 for supporting the conventional chassis vframe of the truck, broadly designated at I3.

.nel members 22 and 23, a front cross frame angle bar 24 and a rear cross frame bar 25 which is bent inwardly at its central portion in Figure 18 and is connected to the rear ends of spaced tie bars 26 and 21 by any suitable means such as bolts 30. Y

The front ends of the tie bars 2S and 2l are secured as by bolts 3l to the vertical portion of the horizontally disposed cross frame member 24. Spaced transverse shafts 33 and 34 are fixedly mounted in the longitudinally extending channel bars 22 and 23 of the auxiliary frame 2I. The` purpose of these shafts 33 and 34 will be later described. There is a third transverse shaft 35 extending between the channel bars' 22 and 23 and being iixedly mounted therein and on opposed ends of which conventional support brackets 31 and 38 are pivotally mounted, these brack -ets 3l and 38 being a part of a conventional dump truck bed broadly designated at 4U.

The support brackets 3l and 38 are secured as 'by bolts 42 to longitudinally extending channel `bars 43 and 44 (Figure `5r) ywhich lnormally rest on the upper flanges fof 'the 'channel bars `S22 n.and 23 oi the auxiliary frame L21 when "the (dump truci; bed 4e is in the horizontal positionfshown in Figure Ai. Suitable guide members 145 and 4t are show-n in Figures 4 and 18 'as :being welded to the remote surfaces of Athe channel bars 22 and 23 of the auxiliary trame l2I Vfto'assist Ain lo eating the front end of the dump "truck Lbed Il'ii in `proper aiinement with the-auxiliaryframe V211i `when in lowered position as shown in'Figure `Li.

The bed 4i) also comprisesside "panelsfe and et, the front ends of which in Figure Al, fare welded to a front panel member 5.2 and the 'rear ends ci which are connected in v'a conventional manner to a rear panel or `gate -53. The vside panels t and iii are provided with "suitable 'reiniorcing 'gusset members 455, the vflower `edges 'of which, in Figures 4 and 5, aresuitablyrcom nected to horizontally disposed plate members'l and 3i extending longitudinallyat-opposed sides of the dump truck bed 4I).

The side walls 5D and'i and the front and rear walls 52 and 53 are supported at theirlower ends on a horiscntallydisposed bottom plate 63 which is, in turn, secured in a conventional manner to the upper anges of the longitudinally extending channel bars 43 and -44 'as shown in Figure 5.

In order to facilitate the use of 4'the conven tional truck bed 4G with the present invention, I have provided an opening 64 in the lower een tral portion of the rear panel 53 of the bed 40, at opposed sides of which vertically disposed guide rails 65 and 66 (Figure 5) are weldedto the rear panel 53 and extend from itsupper to its lower edges.

Mounted for frictional sliding movement between the vertically disposed guide members B5 and @E in Figure 5 is a door `61 which is adapted to normally close the opening E4. This door B1 has a lint: 1B pivotally connected 'thereto as at 1i (Figure 5) to the lower Vend of )which a lever arm 12 is pivotally connected 'as 'at 13. 'This lever arm 12 is oscillatably mounted linterino diate its ends as at Y15 on the -vertically disposed guide rails E5. The lever arm "12 extends asubstantial Vdistance beyond `the point 15 in T'Figure 5 and has an cutwardlyand upwardlybent handie portion 16 integral therewith for manipulation of the lever arm 12 bythe operator of the truck for raising or lowering the door `61 when `it is desired to empty the contents from within "the truck bed 49. A pair of spaced L-shaped brackets 1'! and 13 are welded to the'plate B0 `andare provided to serve asia storage rack for the detachable conveyor, `to be later described, when it is not in use.

Referring to Figures 1, 7, l() and 18 there is shown a conventional hydraulic apparatus broadly designated at 8!! for controlling the ras ing and lowering of the truck bed .from 'the position shown in Figure 4 to the positionshown in Figure 10 and vice versa, and a .detailed'description of which is given in U.'S.'Patents'Num bered 1,760,808, 1,893,124, and 1,893,125. "Therefore, only a brief description will be given 'of this hydraulic apparatus.

The hydraulic apparatus comprises a 'cylinder 8i having a suitable piston 82 mounted 'for longitudinal reciprocation therein and from which a piston 'rod 84extends. The "upper free end of the piston rod 84 in Figures"l and 10 is `threadably'imbeddedinacross arm '85 (Figure 1-8) Aopposed "ends of "which nare restricted "as Aat '6 85 .1 and .each restricted end 588 :slidalbly `penetrates the `rearmost V,portions lof 4 sulcstantially triangu- `larlyshaped built-up arms .S81 zand 31".

The lower endsof :the arms81 andl81' are osciliatably mounted on the intermediate transverse shaft .34 4and the upper portions of the trisingularly-shaped arms 81 :and 81' have opposed ends .of shafts 192, 93 :and 594 suitably `secured thereto. Referring to Figure "10, itgmay be noted that the shaft 92 is ipivotally connected to aplate member or vbracket A96 `which pivotally con- `nested las at 91 to 'the bottom plate 63 of the truci: bed 4I3fand which has fan'arcuate `slot T100 therein slidably penetrated bytheshaftSS. 'The plate 196 also has `va notch |02 Ztherein Awhich is vadapted :to engage fthe shaft 94 'when the lbed #4B is in "the horizontal fposition shown in 'Figure '4.

'Referring again Ito AFigures il 'and .'18, lit l'may be observed that 'the lower Aend Il'of lthe cylinder 480 is cscillatably mounted im 'the 'foremost of 'the transverse shafts .33 secured fin .the `auxiliary iframe EI, all of `which is-clearly shown .in`U. S. Letters "Patent No. 1,893,125 -of yJanuary 3, 11933. A suitable 'hydraulic pump |05 "is secured to the lower end of the cylinder lIl! `and .also comniunicates with the interior Jthereof and a return pipe it is connected at its upper end adjacent the upper end of the-cylinder 8l and at-its lower end to the hydraulic pump 135. A suitable valve i echanism It?, only 'the :housing of which is vn in Figure i8, isdisposed-between the hydraulic pump `I t5 andthe lower end of the cylintl and has acontrolfarm lIiIsecured to the upper end thereof. This valve mechanism is clearly shown in the said Patent No. 21,893,125. lower lend of the control "arm I .Iin Figures l and i5 has one end of a connecting rod I I I pivotaliy connected thereto, the other end "of `the connecting rod being pivota'ily connected `to the inner end of a short leverlarrn lI I`31Which is a part of thepresent invention. This vlever-'arm II3 is preferably oscillatably -connected tothe lower surface of the longitudinally extending brace` bar 2t intermediate its ends and has the front endof `a controlrod l I4 connected-thereto. This contrai red I I4 extends'rearwardlyfat-a s'lightlylower ele.- vation than the transversershafts 33 Vandl34 and slidably penetrates vthe rear `transverse 'frame member I1 of the chassis I3 (Figure 5) and has a VVerticady extending "handle member i. I 5 secured thereto as by Welding.

The' conventional hydraulic motor pump 105 in lFigure 18 is driven by `a conventional shaft 22e extending from `the lower end thereof and being connected, by a universal joint |21, to a eas'wardly and downwardlyextendingshaft I22. The iront endor the 'shaft |22 is connected, as by a universal joint iitotheirearend ci a stub yshaft 12e which extends forwardly and is rotatably mounted inra `semi-circular casing 6250i `a gear housing 'broadly designated at 121. This gear casing 25 is fiange'd and secured aslbyibolts :Edil (Figure 6) te a ltubular block member TMii, to the opposite side ofiwhichfafsecond semicircuvlar casing ISE issecured by the same bolts i3d which'secure the casingi |25 to theftubular block i3! (Figures 6 and 15). "The block- I'3`I lof the'gear `housing i I 2 1 is supported by anangle clip I 34 secured thereto as by a `screw I35, theupper end -f of the angle clip |34 being secured, vasby welding, to the lower surface oi' the transverseiframe member `I oi -the chassis I3. The block `IIIII is also isupportedby astrap iron Ymember i136, secured to the lower surfacefofftheblock I'3I asby-a 7e screw :I 31. The Istrap iron 7member '136 i extends outwardly in'Figur'e 6 and is welded to the outer surface. of the web portion of the longitudinally extending channel bar l of the truck chassis |3 to tlfius'secureV the gear housing |21 to the truck -chassis I3.

.transmitting rotation from the shaft |42 to the shaft -is shown in Figure 16. In the modified form of this portion of the invention, like parts will bear like reference characters to the parts shown in Figure 6, inasmuch as the modified form Vmerely comprises a pair of sprocketV wheels |45 and |46 which are interconnected by a sprocket chain |61, the sprocket wheels |65 and |46 being ixedly mounted on the shafts |24 and |42, respectively.

In the modified means for transmitting rotation from the shaft |42 to the shaft |24 it is obvious that rotation in a like direction will be iin parted to both of the shafts |24 and |42 while in the original form shown in Figure 6, rotation in the opposite direction Would be transmitted from the shaft |52 from that imparted to the shaft |24.

The front end of the shaft |42 in Figure 1 is 5 connected by a universal joint |50 to a forwardly extending shaft |5|, the front end of which is Vconnected to a shaft |52 by a universal connecu tion |53 which is similar in all respects to the universal connection |50.

The shaft |52 is a conventional power take-off shaft and is rotatably mounted in a conventional housing |55 of the power take-oil unit (Figures l, 2 and 3).

y This housing |55 is secured by bolts conventional transmission housing |51 of a mo. tor vehicle. The shaft |52 has an enlarged spline-:i portion on which is keyed a gear |6|. This gear |6| is normally in engagement with a constantly rotating gear |62 of the transmission when the power take-off unit is delivering power to the shaft |5|. However, when the shaft |5| is not in operation, the gear |6| is moved out of engagement with the gear |62. The means for moving the gear |6| back and forth, in and out of engagement with the gear |52, is effected by means of a suitable forked yoke |63 which has suitable prongs |54 extending adjacent opposed sides of the gear |6I. The yoke |63 is fixedly mounted on a shaft |65, which, in turn, is slidably mounted in the power take-off housing |55.

Pivotally connected to the left-hand end of the shaft I|65, as at |66, is an upwardly extending lever |61. This lever |61 is pivoted intermediate its ends as at |10 to a projection |1| extending laterally from the housing |55. When it is desired to move the gear |6| out of engagement withthe gear |62, it is only necessary to partially rotate the lever |61 in a clockwise direction in Figure 2, thereby causing the shaft |65 and its associated yoke |63 to move the gear |6| to the left in Figure 13 upon the splined portion |66 of the shaft |52 and thereby cause it to become disengaged from the gear |62.

In order to facilitate the moving of the gear |6| alongthe splined portion |60 of the shaft |52, so ias to move the same into and out of engagement with the gear |62, it is obvious that rotation of the gear |62 must be temporarily stopped. Therefore, I have provided a mechanism adapted to operatethe conventional clutch mechanism of trucks of this type such as is described in the patent to R. E. Wall, No. 2,284,853 of June 2, 1942 and which is shown in Figures 1 and 10 of said patent.V The conventional clutch pedal |15 is pivoted as at |116 in a conventional manner. An extension |11 is provided on the lower portion of the clutch pedal |15 to which is pivoted. as at |80, the front end of a link IBI.

The link |8| extends to the rear of the truck, slidably penetrates the horizontally disposed frame member l1 of the chassis i3, and has a vertically disposed handle member 132 (Figure 5) secured to the free end thereof as by welding for engagement by the hand of an operator. When the link |6i is pulled to the right in Figure 1, the clutch pedal |15 will be swung on its pivot to disengage conventional clutch mechanism, not shown, associated with trucks of this type to thus permit the rotation of the gear |82 to cease so as to permit the gear |6| to be moved into or out of engagement with the gear |62 by manipulation of the lever |61.

Referring again to the shaft |42, it may be observed in Figures l and 18 that it extends rearwardly and is connected to a rearwardly extending shaft |55 by a universal connection |86. The rear end of the shaft |85 is connected, by a Vuniversal connection |81 identical to the universal connection |66, to a tubular shaft |96 which is preferably polygonal in cross section and which has a conforming shaft|62 mounted for longitudinal sliding movement therein (Figures 1 and 18). The front end of the shaft |65 in Figure 18 is supported by the shaft |42 and the rear end of the shaft |35 is rotatably mounted in a suitable bearing block |03 suitably secured -to the longitudinally extending channel bar |5 of the chassis frame i3. Y

The shafts |50 and |92 extend rearwardly and downwardly at an angle and the shaft |92 is connected by a universal joint |95 (Figures l and 18) to a stub shaft |56 rotatably mounted in a forwardly projecting portion |91 of a gear housn ing 200. The shaft |96 extends into the housing 200 and has a beveled gear 25| xedly mounted on its end which cooperates with a large gear 202 having levier and upper beveled gear toothed surfaces 253 and 20d, respectively, the beveled gear 20| meshing with the lower beveled gear 4cap member orrhousing 2id. The upper edge of the housing 200 and the lower edge of the cover member 2li! are provided with coinciding annular grooves so the coverV 2|@ may rotate on the housing 260 and may beheld in axial alinement 'with the same. Y

The gear 262 is rotatably mounted on a vertically disposed shaft 2|| which slidably penetrates the lower and upper housings 250 and 2|0 and has oneor more suitable nuts 2|3 threadably mounted on one or both ends thereof for securing the portions 260and 2|0 together.

The manner in which the gear housing 260 is connected to the chassis I3 of the truck is a main feature ofthis invention and vwill be later de scribed in detail.

Referring to Figure 17 it may be observed that the universal mounting cover 2|() has a substann tially semi-circular hollow portion 2|5 to provide space in which a bevelled gear 2|6, meshing with the upper toothed portion 204 of the gear 202, is disposed.

This gear 2|5 is iixedly mounted on one end n of a shaft 2 |1 rotatably mounted in an, outwardly projecting bearing portion 220 integral with the cover member 2 IIJ. This outwardly projecting portion 22D is preferably circular in cross section and has a flanged portion 22| of an angularly disposed chain guard housing 222 secured thereto by any suitable means such as screws 2|3. This chain guard housing 222 is capped by a simi-.arly

shaped cap member 223 secured thereto as by shaft 230 also extends through the housing 222 and has a femaleI clutch member 223 fixedly mounted thereon provided with a plurality or" bores, 234 which are adapted to slidably receive pins 255 of a mating clutch dog member to be later described and which is a part of the conveyor apparatus which may be removably connected to the universal mounting housing 2|0,

Secured to the outer surface of the chain guard housing 222, as by screws 240 (Figures 12 and i7) is a built-up Z -shaped bracket 24| of welded conv struction having a semi-circular cavity or notch 242 in the upper surface of its upper leg.

The cover member 2|0 in Figure 1,7 has an outwardly projecting portion 244 integral therewith, to the outer surface of which an upwardly and forwardly extending angularly disposed arm 245 is secured, as by screws 246, and the arm 245 has a semi-circular cavity or notch 241 therein which is in transverse alinement with the cavity 242 in the bracket 24|. The semi-circular notches 242 and 241 in bracket 24! and arm 245, respectively, are adapted to slidably receive bearing members 25|!` and 25|, respectively, of a delivery conveying apparatus broadly designated at 252 (Figure ,11). The structure of the conveying apparatus 252 and the .manner in which it is connected to the universal mounting `2li) are very similar to that shown in my (zo-.pending applica tion entitled Improved Unloading Truck, Serial Number 51,419, led September 27, 1948 and now Patent No. 2,520,291, granted August 29, 1950.

The bearing members 250 and 25| in Figure 11 penetrate brackets 253 and 254, respectively, which be integral therewith or may be welded thereto as shown i n Figure 11. The brackets 253 and 254 are identical, the braclget 253 also being 'Shown in Figure 13. The bracket 253 is adapted to engage the inner surface of the built-.up 2j-shaped bracket 24| when the bearing member 252 is inserted in its cavity 242. However, the

bracket 254 on the bearing member 25| is spaced ,a substantial distance apart from the proximate surface of the aneularly `disposed arm 245 when the bearing member 25| is seated in the semis Circular cavity 24.1. Therefore, there has been provided an arm 256 (Figure 4)` which is pivotally connected as at 251 to the inner surface of the arm 245 and a wider curved portion 260 is integral with the arm 256 and conforms tothe shape of the bearing member 25| so that upon moving the portion 254 against the member 25|, the conveyor 252 is locked as to endwise movement of the bearing members 25|]` and 25| in engagement with the members 24| and 245. The curved portion 260 of the arm 25.6 is also provided with a handle member 25| welded to. the upperl end thereof for manipulating the same.

The bearing members 25|! and 25| rotatably support a shaft 253 on the left-hand end oi which in `Figure 1 a clutch member 264 is xedly mounted. The shaft 263 is restricted at its ends to prevent endivise movement thereof. This clutch member 264 has a number of spaced pins 265 thereon which are .adapted to be slidably inserted in the bores 235 in the clutch member 234 when the conveyor 252 is mounted on the universal mounting 2|1|l in the manner heretofore described.`

Assuming that the gear |6l in Figure 31 is in enf gagement with the gear |62y of the transmission |51, and that the clutch pedal |15 in Figure l has been moved in such a manner as to trans-,- mit motion to the gear |62, rotation will then be transmitted successively through shafts |52, |5|, |42, |85, |90, |92 and |56 to the beveled gear 20| in Figure 12,.

The beveled gear 20| will, in turn, transmit rotation to the` gear 252 in Figure 5 thus causing the left-hand portion thereof to move towards the observer in Figure l2. The gear 202 `'will then transmit rotation to the gear 2|6 in a clockwise direction in Figure l2 to thus drive the shaft 2| 1 in Figure 17, the sprocket wheel 225, the sprocket chain 226. the wheel 221 on the shaft 230i and the clutch member 234, which, of course, will cause the upper portion of the clutch member 234 to move towards the observer in Figure 17 or away from the observer in Figure 1l. It is thus seen how the clutch member 234 will transmit rotation to the shaft 236 through the medium of the clutch member 264.

The shaft 263 has a conveyor roller 2166 xed thereon (Figures 11 and 13) on lwhich an endless conveyor belt 261 is mounted. The belt 261 is also mounted on a roller 21|) (Figure 1) which is rotatably mounted in adjustable bearing members 21| which are adapted to take up the slack in the belt 261 (Figure 1). An idler roller 268 is provided for supporting the lower reach of the conveyor belt 261 (Figure 10) The manner in which the roller 210 is mounted is clearly shown in the patent to R. E. Wall, No. 2,157,682 of February 8, 1938, and a further description and showing of the same is, therefore, deemed unnecessary.

The bearing blocks 21| in which the roller 2113 is mounted for rotation are suitably secured to side walls 212. and 213 of a trough having a bottom 214 spanning the distance between the side walls 213 and 212. The bottom 214 is secured as by Spot welding to a transverse plate 215 (Figure 13) which spans the distance between rearwardly and downwardly extending portions of the brackets '253 and 254. The upper reach of the conveyor belt 261 is supported between the rollers 265 and 210 by the bottom 2142 of the trough and it: will be noted in Figure 13 that there is a front wall member 28| secured to the side walls 212 and 2.13, as by welding, and

' Spanning the distance therebetween.: The lower edge of this front wall 28| terminates a substantial distance above the upper reach of the conveyor belt 221 and a suitable resilient member 282 is secured to the wall 28| as by rivets 283, only one of which is shown in Figure 13 and this member 282 is adapted to engage the upper reach of the belt 251 to prevent the material which is dumped onto the conveyor adjacent this point from falling back through the opening defined by the lower edge of the front wall-28| and the upper reach of the conveyor belt 251.

In order that the material may be properly transferred or dumped from the opening at the rear end of the dump truck body d onto the upper reach of the conveyor belt 251, suitable walls 285, 235 and 281 (Figures 1, l1 and 13) are secured to the proximate surfaces of the side walls 212 and 213 of the trough and extend upwardly and outwardly at an angle to direct the material onto the conveyor belt 221. The front wall member 281 which is inclined at the same angle relative to the wall 23| as the side wall members 285 and 205i are inclined. relative to the walls 212 and 213 and spans the distance between the members 205 and 285, the lower end of the same being extended downwardly into the trough to further insure that the material dumped from the truck bed i0 will enter the trough and be deposited onto the belt 2&31A

It has already been stated that the manner in which the gear housing 200, which supports the universal mounting 2 l 0, is connected to the chassis l of the truck, isl a main feature of the present invention.

Since both sides of the gear housing 2l0 are mounted and connected to the chassis i3 in an identical manner, the side nearest the observer in Figures 4, 'l and 10 will be described and the side away from the observer in these figures will bear like reference characters with the prime notation added;

The gear housing 200 is secured as by screws 295 to the rearmost ends of longitudinally extending channel bars 29%, 296 which are a part of a longitudinally movable frame broadly designatedy at 291. Referring to Figure 14. it may be observed that the bottom flanges of the channel bars '29B and 20B are welded intermediate their ends to a transverse frame member 300 which extends upwardly and outwardly at opposite ends thereof at an angleV and is secured as by welding to relatively short longitudinally extending channel bars 30| and 30|', the flanges of which extend outwardly with respect to each other. Welded to the front ends of the channel bars 30| and 30| in Figure 14 are remote ends of downwardly and inwardly angularly disposed portions of a cross frame member 304 which also spans the distance between the channel bars 296 and 2953' and is welded to the upper flanges thereof. This completes the structure of the longitudinally movable frame 291 which supports the gear housing 200. Y i

The channel bars 32| and 30| have longitudinal sliding movement between the flanges of longitudinally extending channel bars 305 and 305' (Figure 14) which are parts of an upper pivoted frame broadly designated at 305. Welded to the lower anges of the channel bars 305 and 305' is an angle bar 361 and, in order to prevent dirt and other abrasive matter from falling from the dump truck bed 40 onto the proximate edges of the channel bars 30|, 305 and 3M and 3ii5, suitable shield plates 3|@ and Sill are welded to the proximate edges of the upper ilanges of it fi 12 the channel bars 305 and 305' and extend inwardly and downwardly at an angle, as shown in Figures 9 and 14.

Referring to Figures and 10, it may be observed that the rearmost ends of the channel bars 305 and 305 have suitable stop plates 3il and 3H welded thereto to which the rearmcst edges of the shield members 3|l and Sill', respecvtively, are also welded.

In Figures 4, 7 and 10, there is shown the manner in which the left-hand side of the pivoted frame 306 is connected to the chassis i3 of the truck. The right-hand side of the frame 306 being identical, will bear the same reference characters as the parts shown at the left-hand side of the truck with the prime notations added.

The channel bar 305 is pivotally connected at its left-hand end in Figures 4, 7 and l0 as at 313 to the lower end of a vertically disposed frame bar 3I4 which is secured as by screws 35 to the longitudinally extending channel member lli of the chassis I3. The right-hand end of the channel bar 305 in Figures 4, 7 and 10 is pivoted as at BIB to the lower end of a substantially vertically disposed linkvmember 3|1, the upper end of which is pivotally connected as at 32d to the rearmost end of the longitudinally extending channel bar 43 of the dump truck bed 40.

In order to prevent the pivoted frame E from swinging from side to side at its rearmost end in Figures 4 and 5, suitable strap iron members 522 and 322 are welded to the remote sur`-v faces of the longitudinally extending channel bars I4 and l5 of the chassis vIii and extend downwardly and are bent inwardly and then are extended downwardly and slidably engage the remote vertical surfaces of the longitudinally ex-d tending channel bars 305 and 305 of the plv` oted frame 306. truck bed is in the horizontal position shown in Figure 4, the housing 200 along with the frame 291 and the pivoted frame 306 are moved upwardly to thus provide a substantial clearance between the lower surfaces of the frame 291 and 45 the housing 200 and the ground as the truck aga-in moves from one place to another. A suitable thumb screw 323 threadably penetrates the web of the channel bar 305 (Figure 14) and bears against the web of channel bar 30| for holding' the telescopic frame 291 in adjusted position rela tive to the pivoted frame 305.

When it is desired to use the conveying appal ratus, as will be the case when the contents or material in the bed 40 must be deliveredto a point remote from the truck, the conveying ape paratus 252 is connected to the universal mountd ing 2|0 in the manner heretofore described, and,- by moving the handle |82, for controlling the clutch pedal |15, forwardly, the power take-oil? will transmit motion to the conveyor belt 261 in a clockwise direction in Figure 13 in the manner heretofore described. The longitudinally movable frame 291 with the universal mounting 2| 0 and the gear housing 200 is then moved rear- Wardly to the position shown in Figures 4 and 10 to thus position the front end of the conveying apparatus 242 below the discharge end of the dump truck bed when it is in elevated or tilted. position. Assuming that theV bed 4G is in its nor-l mal horizontal position, the operator then grasps the handle ||5 and manipulates the same in such a manner as to actuate the valve mechanism shown at |01 in Figure 18, and to thus cause the fluid in the hydraulic cylinder 8| to surge upwardly, inasmuch as the pump |05 will be driven It is thus seen that when the i as heretofore described,v thus:` causimgtthe piston.

rod 84 to move upwardlyvand, in so doing; causingv the truck4 bed to be tilted atiits. front end.`

or moved` from. the position shown in, Figure 4' to substantially the position shown in Figuresv i and 10.`

Prior to or after tilting the bed llt, the operator:

grasps the handle 'I6 oi' the. lever l2` and moves the same in a clockwise direction to thus move the door 6"! upwardly and, then the material within the bed 4l) will move, by gravity, through the opening 64 and will fall onto the upper reach of the belt 267, as shown in Figure 10, which will thus carry the material to a point remote from the truck;

Now in the event that the operator desires to dump the contents from the bed #le immediately below the rear end` of the same when it is ina tilted position as' shown in Figure 7, the conveying amoaratusl 252 may be removed from the `universal mounting 2id', simply by moving the In drawings and'` specification. there has the claims 11 to dis-engage the clutch members 254 and .Le

234, after which the conveying apparatus 2-52- may be removed from the mounting Elli.

The operator then pushes the rear end of the gear housing 200 in a forward direction and the channel bars 33| and 319| in Figure 12 will slide .'r,

between the flanges of the channel bars m35 and 3F15' and the housing 290 is moved forwardly wardly of the rear end of the gear vhousing 250 and the associated mounting 2|il,

In order to permit the gear housing 200 to be moved longitudinally relative to the truck chassis I3, the telescoping shaft ['92 is provided in the tubular shaft |83. It is obvious that an operator would merely reverse the procedure above described by manipulating the handles H5 and |82 at the rear of the truck when he desired to return the truck bed 4|! from the tilted position shown in Figures 7 and l0 to the position shown in Figure 4 and when it is desired to stop movement of the` conveyor belt 261.

It4 is thus seen that I have provided a universally mounted conveying apparatus for use wit dump bed types of vehicular trucks wherein means are provided for positioning the conveyor mediately below a discharge opening at the rear end of the truck so that the contents may be dumped from the truck bed onto the conveyor and wherein. other means are provided whereby the conveyor may he removed from the universal mounting and the univcrsai mounting along with the gear housing from the conveyor may be moved beneath the chassis of the truch when it is desired to merely dump the material from within the truck bed onto the ground immediately therebelow.

I have further provided means whereby a single operator may controi the action of the truck body and the driving of the conveying apparatus from a point at the rea-r of the truck, thereby eliminating the necessity of employing an addi` tional operator in the operation of this apparatus.

Iclairn: 1. Material handling apparatus adapted to, be

i mounted on almotor driven wheeled truck having a chassis andi also havinga dump bed mounted thereon andi said dumpv bed also being pivoted near` it's rear end" to' the chassis and also having means:- for' raising and lowering the front end to tiltlthebed and said bed also having an opening inl its rear end provided with a-closure therefor and through which the contents of the bed may be dumped' whenA its frontend is raised relative tothe chassis, said apparatus comprising a frame disposed beneath the rear end ofthe chassis and being pivoted to the chassis at its front end and also havingl upwardly projectingmembers at its rear'end` whose upper ends are pivotally connected to' thebed, a telescopic frame slidablysupported by` the pivoted frame and being movable forwardly and rearwardly of the pivoted frame, a gear housing mounted on the telescopic frame and having a driving connection with the motor of the truck, means on the gear housing for supporting the forward end of a discharge endless` conveyor and driving means between the gear housingand the forward end of` the discharge conveyor for driving thedischarge endless conveyor.

Material handling apparatus adapted to be mounted on a motor driven wheeled truck having a chassis and also having a` dump bed mounted thereon, and said dump bed also being' pivoted near its rear end to the chassis and also having means for raising and lowering. the front end to tilt' the bed and` said bed also having an opening in its rear end provided with a closure therefor and through which the contents` of. the bed may be dumped when its front end is raised relative to the chassis, said apparatus comprising a frame disposed, beneath the rear end of the chassis and being pivoted to the. chassis at its front end and also having upwardly projecting members pivoted at their lowerl ends to the rear end of the telescopic frame and'4 whose upper ends are pivotally connected tothe bed at a point rearwardly of the pivot point between the bed and the chassis, a telescopic frame supported by the pivoted frame and. being movable forwardly and rearwardly of' the pivoted. frame, a gear housing mounted on the telescopic frame and having a driving connection with the motor of the truck, means on the gear housing for detachably supporting the forward end. of a discharge endless conveyor, driving means between the gear housing and. the forward end of the discharge conveyor for driving the discharge endless conveyon the telescopic frame together with itsA gear housing being movabie forwardly of the truck, after the endless' conveyor has been detached therefrom whereby the truck bed may be tilted to discharge the contents thereof through the opening in the rear end thereof so that the contents will fall clear ofthe gearhousing.

Material handling apparatus comprising a motor driven wheeled truck having a chassis and a dump bed mounted thereon, said dump bed being pivoted near its rear end to the chassis and having meansvfor raising and lowering the front end, and said bed having anopening in its rear end and provided with a closure therefor and vthrough which the contents of the bed may be dumped when its front end is raised relative to the. chassis, a frame disposed beneath the rear end of the chassis and being pivoted to the chassis at its front end and `also having upwardly projecting members pivotally secured thereto at its rear end whose upper ends are pivotally connected to the bed at a point rearwardly of the pivot point between the bed and the chassis, a telescopic frame supported by the pivoted frame and being movable forwardly and rearwardly of the pivoted frame, a gearV housing mounted on the telescopic frame and having a drivingy connection with the motor of the truck, means on the gear housing for supporting the forward end of a discharge endless conveyor, driving means etween the gear housing and the forward end of the discharge conveyor for driving the discharge endless conveyor, the gear housing comprising a base portion and a top portion mounted on a vertical axis for rotation relative tol the base portion, and the means on the gear housingl for supporting the forward end of the discharge ,idless conveyor permitting vertical swinging of the rear end of the conveyor.

4. In a wheeled truck having a chassis and an engine for propellingthe truck and having a dump bed thereon pivoted near its rear end to the chassis and having means on the chassis connected to the front portion of the dump bed for raising and lowering the front portion of the dump bed, said dump bed having a discharge opening in its rear end-and a suitable closure member for said discharge opening whereby the contents of the dump bed may be discharged through said opening when the front end of the dump bed is raised relative to the chassis, a frame disposed below the rear end of the chassis and having its forward end pivotally secured to the chassis and a pivoted link connection between the rear end of the frame and a point on the rear end of the dump bed disposed `rearwardly of the pivot point of the dump bed whereby the rear end of the frame will be lowered and raised with the lowering and raising of the rear end of the truck bed, a telescopic frame supported by the first-named fram-e and having a gear housing thereon, intermeshing gears disposed within the gear housing, means connectable to the engine for driving the gears within the housing, said gear housing having means for supporting the forward end of an endless discharge conveyor and driving means disposedbetween the forward end of the discharge conveyor and the gears in the gear housing, said telescopic frame being movable forwardly and rearwardly relative to the chassis of the truck to cause the contents from the truck. bed to be delivered onto the forwardend of the discharge conveyor the forward end of the discharge conveyor being entirely removable from the gear housing whereby the gear housing and the telescopic frame may be moved forwardly relative to the chassis so that the contents of the truck bed may be discharged onto the ground on which the truck rests clear of the gear housingin telescoped position.

5. In a dump truck having a chassis and also having a bed mounted thereon and said bed also being pivoted near its rear end to the chassis and said truck also having means for raising. and lowering the front end of the bed so as to tilt the bed and said bed also having aopening with a suitable closure therefor in the rear end of the bed and through `which the contents of the `bed may be dumped, an improved unloading apparatus comprising forwardly and rearwardly movable means disposed below the chassis and having its front end pivotally secured to the chassis and having its rear end pivotally secured to the rear end of the bed and having means on its rea-r end for detaohably supporting the forward end of an endless conveyor for receiving the niaterial dumped from the truck and conveying it to a point remote from the truck., the means for driving the endless conveyor being movable forwardly relative to the chassis of the truck to a point where the contents discharged from the bed of the truck will fall clear of the means for driving the endless conveyor when the endless conveyor is removed therefrom.

6. An improved unloading apparatus for dump trucks, said dump truck having a wheeled chassis and also having an engine for propelling the same and also having a bed thereon provided with an opening in its rear end and being pivoted near its rear end to the chassis `and also having means driven by the engine for raising andV lowering the front end of the bed to dump the contents of the bed through the opening in the rear end thereof, said improved unloading apparatus comprising a frame pivoted at its front end beneath the rear end of the chassis and havingr a pivotal connection between the rear end of the pivoted frame and the extreme rear end of the bed whereby the rear end of the pivoted frame will be raised and lowered with the raising and lowering of the extreme rear end of the bed7 a telescopic frame mounted for forward and rearward sliding movement in the pivoted frame and disposed at a lower level than the pivoted frame and having a vertically disposed shaft therein, said shaft having a gear wheel mounted ther-ein on a vertical axis and having beveled gears on its lower and upper surfaces, a driving connection between the engine and the lower beveled gear on the gear wheel, means on the gear housing for supporting the forward end 'of an endless conveyor frame, a driving connection between the upper beveled gear on said gear wheel in the gear housing and the forward end of the endless conveyor for imparting movement thereto, the driving connection between the engine and the lower beveled gear on said gear housing being telescopic so that the telescopic frame along with its gear housing can be moved forwardly and rearwardly relative to the pivoted frame, said endless conveyor being detachably connected to the gear housing so that it can be entirely removed from the gear housing and then the gear housing withV its telescopic frame may be moved forwardly relative to the pivoted frame so that the contents of the truck bed may be dumped through the opening in the rear end of the truck bed and fall downwardly clear of the gear housing mounted on the telescopic frame.

LINDSAY S. WALL.

REFERENCES GETED v The following references are of record in the le of this patent:

UNITED STATES PATENTS 

